elf4j-jul
An adapter to use java.util.logging as service provider and runtime logging engine for the ELF4J (Easy Logging Facade for Java) API
User Story
As an application developer using the ELF4J API, I want to have the option of selecting java.util.logging (JUL) as my log engine, at application deploy time without code change or re-compile.
Prerequisite
Java 8+
Get It…
Use It…
If you are using the ELF4J API for logging, and wish to select or change to use java.util.logging as the run-time implementation, then simply pack this service provider in the classpath when the application deploys. No code change needed. At compile time, the client code is unaware of this run-time logging service provider. With the ELF4J facade, opting for java.util.logging as the logging implementation is a deployment-time decision.
The usual java.util.logging configuration applies.
With Maven, in addition to use compile-scope on the ELF4J API dependency, an end-user application would use runtime-scope for this provider as a dependency:
<dependency>
<groupId>io.github.elf4j</groupId>
<artifactId>elf4j</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.github.elf4j</groupId>
<artifactId>elf4j-jul</artifactId>
<scope>runtime</scope>
</dependency>
Note: Only one logging provider such as this should be in effect at run-time. If multiple providers end up in the final
build of an application, somehow, then the elf4j.service.provider.fqcn system property will have to be used to select
the desired provider.
java -Delf4j.service.provider.fqcn="elf4j.jul.JulLoggerFactory" -jar MyApplication.jar